Type-writing machine.



F. A.DOLPH.

TYPE WRITING MACHINE.

APPLICATION FILED SEPT, 25, 1916.

Patented July 3, 1917.,

5 SHEETS-SHEET I.

F. A .DOLPH.

TYPE WRITING MACHINE.

APPLICATION FILED SEPT-25,19I6.

Patimted July 3, 1917.

5 SHEETSSHEET 3- 1&1

F. A' DOLPH.

TYPE WRITING MACHINE- APPLICATION FILED SEPT-25. l9l.6.

Patented July 3, 1917.

5 SHEETS-SHEET 4- -4 F. A DOLPH.

TYPEWRITINGMACHINE.

APPLICATlON man SEPT- 25. me.

Patented July 3, 191?.

5 SHEETS-shin 5.

STATE% FRED A. DOLPH, OF CHICAGO, ILLINOIS.

TYPE-WRITING MACHINE.

Application filed September 25, 1916.

To all whom it may concern:

Be it known that I, FRED A. DOLPH, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to typewriting machines of that general class which is designed with particular reference to requirements of court reporting and similar work.

Among the purposes of the invention is to decrease the time required for operating such machines byemploying certain mechanisms, movements of which may be accomplished at comparatively high speed, and to provide improved constructions including means whereby keys may be successively or simultaneously depressed as rapidly as desired, separate means under the control of said keys being arranged for efi'ecting an impression of an entire line after the required number of keys have been depressed.

Further objects of the invention are to provide improved means whereby the different keys of the keyboard may be differentially depressed to control the setting of type carriers in such manner that each key may be employed for setting a plurality of different characters; to provide an improved adjustable automatic line spacing mechanism; and to provide means for automatically throwing out of operation the paper feed or line spacing mechanism when the paper is manually adjusted backwardly.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which:

Figure l is a plan view of a type writer constructed according to this invention.

Fig. 2 is a view in elevation of a longitudinal section ofthe machine.

Fig. 3 is a transverse vertical section taken on the line B-B of Fig. 2.

Fig. 4c is a front view partly in section of the platen and related mechanism.

Fig. 5 is a sectional view in elevation on the line AA of Fig. 4.

Fig. 6 shows details of the means employed for throwing out of operation the paper feed device.

Fig. 7 is an enlarged detail of one of the typewriter keys and its mounting.

Specification of Letters Patent.

Patented July 3, 191W.

Serial No. 122,012.

Fig. 8 is a sectional View taken on the line (3-0 of Fig. 7.

Fig. 9 is a detail showing means for differentially adjusting key. detents.

Fig. 10 is a detail of one of the type carriers.

Figs. 11 and 12 show details-of means for releasing keys upon completions of operations of the machine.

It is well known that such typewriting machines wherein the keys individually effect the impression of the desired characters in succession cannot be efficiently operated at the required speed for some classes of work, for the reason that it is impossible to effect the impression of combinations of In the present machine, the keys are set upon their depression, and after the required number have been depressed for controlling the setting of a line of type, a movable device is operated to effect the setting of the type carriers as controlled by the keys and to operate the impression and paper feed mechanisms.

In its general arrangement, the present machine is provided with a keyboard comprising a plurality of duplicated banks with keys extending from the front to the rear of the keyboard. The number of keys in each bank preferably corresponds to the number of letters in the alphabet, and the keys are similarly arranged. in each bank. Thus, the A keys form the lowermost rows of'keys. from side to side of the machine, and the B keys the second 'row from the bottom, etc. Av key detent is provided for each bank of keys for retaining in set position a depressed key. The key detents are differentially adjustable by separate manipulative devices in order that different retaining shoulders thereon may be positioned to cooperate with pins on the keys, so that the keys may be depressed different distances and retained in different positions in order that each may differentially control the type carrier for its respective bank.

The type carriers are in the form of bars, one being provided for each bank of keys, and are loosely supported in channels cut in the reciprocating type carriage which has a motion in the direction of length of the key banks. Thus, after keys are depressed for controlling the setting of a line of type, the carriage is reciprocated, causing all the type bars to be moved forwardly until the same are stopped by engagement with the depressed keys. Toward the end of the forward stroke of the carriage, inking rollers pass over the type and then the platen is automatically rocked downwardly, effecting the impression of a line on the paper supported thereon. During the return motion of the platen, when the type bed or carriage moves rearwardly, the paper is fed to a position for receiving an impression of the next line. As the platen arrives at its initial position, all of the key detents are pushed rearwardly slightly, and return re leasing the depressed keys.

Referring to the drawings, the frame 1 is shown arranged for supporting the key board unit 2 and a reciprocating type carriage 3. A platen frame 4 is pivoted by means of pins 5 to lugs 6 on frame 1, and may be rocked downwardly against the action of springs 7 to elfect an impression from type bars 8 through the opening 9 in frame 1.

The machine may be motor driven, but as here shown ower for operating the machine, includlng the adjustment of the type and rocking of the platen, is effected by means of crank arms 10 connected together by operating handle 10.1 and pivoted to frame 1 by a shaft 10.2. Secured to the outer end of the cranks are straps 11 extending from the frame to wheels 12 on the shaft 13 journaled in frame 1. The straps 11 are also secured to wheels 12, and rigid with the latter on shaft 13 are wheels 14 to which are'secured at one end straps 15 in turn riveted at points 16 to the upper 5 end of the type bed 3. Straps 15 from thence pass over rollers 17 on the frame 1 and at their free ends carry counter'weights 18. Byv this arrangement, when crank 10 is pulled forward-1y, the wheels 12 and 14 are rotated to the right, (Fig. 2) and through the straps 15 pulling the type bed or carriage 3 forwardly and downwardly its full stroke as guided in frame 1. Vhen the crank handle is released, the carriage 3 returns to its initial position as shown in Fig. 2 by weights 18. j

The type bars 8 at their forward ends are bent into fan formation to extend outwardly so that the ends of said bars are respectively in alinement with their corresponding banks of keys 19 (Fig. 3). The parts 20 of the bars which are in alinement with the different banks of keys are bent upwardly as shown in Fig. 3 and are slidable in slots 21 in the keyboard frame 22. These bent portions of the type bars at their extreme upper ends have a plurality of shoulders 23 for engagement with depressed keys upon the forward stroke of carriage 3. The lower ends 24 of the shanks of the keys are suitably formed to act as stops for the type bars by engagement with the desired ones of shoulders 23. As shown by dotted lines in Fig. 8, each key may be depressed to three different positions in order that it may stop the type bar for such bank at three different points.

The carriage 3 supports inking rollers 25 which receive ink from the inking surfaces 26 and 26.1 of frame 1 and ink the type through the opening 9 during the reciprocation of the carriage. This carriage also supports rollers 27 in position to engage the edges 28 of platen frame 4 after the type have been inked, causing the platen 29 to rock downwardly and eii'ect the impression through opening 9. Upon the return of the carriage 3, the springs 7 restore the platen to normal position.

The platen 29, as shown in detail in Figs. 4 and 5, may be of usual construction, and is provided with a ratchet wheel 30 for engagement with a pawl 31 in order. that the platen may be rotated as required for line spacing.

The paper feed mechanism comprises means for controlling pawl 31 with respect to ratchet 30 during the oscillating motion of the platen, and when it is moved toward and away from the type carriers. Pawl 31 is pivoted to the upper end of an arm 32, in turn pivoted on the platen shaft 33. The lower end of arm 32 is slotted to receive the pin 34 on an adjustable block 35 carried on the end of a lever 36. This lever may be adjusted to different positions, thereby shifting the pin 34 along slot 32. Lever 36 may be retained in its adjusted positions by a spring 37 thereon engaging a toothed member 38 fixed to frame 1. Since the pivotal support for the platen is out of axial aline ment with the pin 34, the rocking motion of platen frame 4 results in causing the arm 32 to rock around its pivotal support 33 and thereby cause the pawl 31 to oscillate back and forth with respect to ratchet 30, and rotating the platen as required for line spacing. The platen shaft 33 supports the usual knurled head 39 by which it may be rotated in either direction. In order that pawl 31 may be disengaged from ratchet 30 upon rotation in one direction of the knurled head 39, this head is secured to a sleeve 40 loose on the shaft 33 but carrying'rigid a disk 41 having tangential slots 42 for engagement with pins 43 on radially adjustable sectors 44. These sectors are suitably located to engage a pin 45 on pawl 31 and disengage the pawl on the initial motion of the knurled head 39 prior to its rotating the platen. The knurled head transmits its motion to the platen through the pins 43 and sectorslt which are grooved and slidable along pins 46 on a disk 47 fast to platen shaft 33.

The frame 50 of the keyboard as shown in Fig. 3 is provided with slots 21 into which extend the shoulder portions 23 of the type bars. The upper ends of slots 21 are enlarged to provide space for the adjustable key detents 52 and the key pins 53 which cotiperate with said detents. The slots 51 are preferably drilled out at the location of the keys and the pins 53, to properly guide and prevent displacement of the keys. Each key is depressible against the action of a spring 54 encircling the upper end of the shank of the key and bearing between the head 55 thereof and a shoulder 56 on the frame 50. Each key detent 52 is provided with a shouldered portion 57 at the location of each key on the corresponding bank. These shoulders cooperate with pins 53 for the purpose of retaining keys in their depressed cooperate with the key pin.

position. Normally, the upper shoulder is in position to be engaged by the pin on the corresponding key, but the detent 52 is adjustable so that one of the three shoulders on the part 57 thereof may be positioned to According to the adjustment of the detent 52, a key may, be retained in different depressed positions, so that the lower end of the shank 24 is in alinement with any one of the shoulders on the portions 23 of the type bars. By this means, each key may stop the corresponding type bar at three different positions, and in this manner effect the setting of three different type, such as a capital or small letter, or some special character. When a key is depressed, the pin 53 of such key engages one of the shoulders on the detent, cam.- ming the same upwardly until the pin clears the shoulder when the detent drops by gravity, retaining the key in its depressed position.

The means for adjusting the detents 52 so that the different shoulders 58 thereof are brought into operative relationship with the keys, comprise the pivoted manipulative members 59. One of these members is provided for each bank of keys, and the lower ends thereof are in position to engage pins 65 on the corresponding key detents. A slight forward motion of member 59 serves to push the detent rearwardly so that the second row of shoulders 58 thereof is positioned opposite pins 53. A further forward motion ofthe member 59 will cause the lower row of shoulders 58 to be positioned in line with the key pins. Each detent is retained in its adjusted position by shoulder pawls 60 which are spring pressed into engagement with teeth 61 and 61.1 ,on the member 59.

The member 59 isxdepressible against the action of a spring 62 by means of either keys 63 or 64 integral therewith. lVhen either of these keys is depressed, the member 59 engages a pin 65 on the corresponding key detent, shifting the same upwardly so that one of the two lower rows of shoulders 58 thereof is positioned to cooperate with the key pins 53. When the key 63 is depresed as far as the surface plate of the keyboard, the pawl 60 engages the shoulders 61, where as when the key 64 is depressed, the pawl 60 engages the shoulder 61.1. In this manner,j the detents are differentially (adjustable to regulate the stroke of the typewriter keys 19. Each key detent is provided with a pin 66 in line with the shoulder 67 of pawl 60, so that by a further upward shifting of the detents, the pawl 60 may be disengaged from the members 59, permitting the l atter to return to normal position. For the purpose of so disengaging the pawl 60 and likewise releasing depressed keys, each detent is provided with. a recess 68 at its upper end, as shown in Fig. 8. A rod 69 passes through the'recesses 68 and is carried by a pair of depending arms 70 rigid on a transverse shaft 71 journaled in the key frames. This shaft also carries rigidly thereon a member 7 2 which may be manually rocked forward thereby causing the rod 69 to lift all of the detents and' release the keys, and also through such action to permit the members 59 to return to normal position, in case the latter members had been previously adjusted away from normal position. The detents may be individually operated to release depressed keys by levers 73 pivoted on the shaft 71 and having their lower arms 74 extending into the recess 68 of the corresponding detent. Accordingly, by rocking any one of the arms 73 forwardly, its respective detent may be shifted upwardly and release a depressed key in such bank.

For the purpose of releasing all the keys at the end of an operation of the machine, one of the operating levers 10, as shown in Figs. 11 and 12, is provided with a pin 75 in position to engage an arm 76 on the shaft 71, causing this arm to rock the shaft on the return stroke of lever 10. In order that the arni 76 may idly ride over pin 75 during the forward stroke of operating lever 10, this arm is loosely journaled on the shaft 71, but'is provided with a split hub 77 through which extends apin 78 fast to the shaft 71. Thus, the arm 76 may rock idly during the forward motion of lever 10, but become effective in rocking the shaft 71 during the return stroke of the lever and thereby release all keys at the end of an operation of the machine.

In operating the machine, assuming" that the mechanism is in its normal position as shown in Fig. 2, the operator may depress the required keys to control the setting of type for an entire line by successively depressing the keys or simultaneously depressing keys in any desired combinations, it being understood that to cause spaces to appear between words, the operator omits to depress a key in the banks corresponding in location to such spaces. The keys may be depressed difi'erent distances in order that each may control the setting of a plurality of type, but the distance to which a key may be depressed is determined by a preliminary. setting of the detents 52.

The setting of the detents is controlled by depressing members 59, which through engagement with the pin 65 may position the detents upwardly different distances, the members 59 being temporarily retained in adjusted position by the pawl 60. After the keys representing one line have. been depressed, the operator draws the handle 10.1 forwardly through the belt connections 11 and 15, causing the type carriage to be drawn downwardly and forwardly along its guides. The type bars are permitted to move with the carriage ,until the shoulders 23 thereof engage depressed keys. Ihe type bars by this means are retained in adjusted position during thd further forward motion of the carriage. The inking rollers are journaled in the type carriage, in position to roll over and receive ink from the surfaces 26, in inking the adjusted type bars through the opening 9. After the type are inked, the rollers 27 engage the inclined edges 28 of the platen carrying frame, rocking this frame downwardly against the action of spring 7 causing the platen 29 to make an impression on the paper thereon, of the line of type which are positioned for an impression through the opening 9. Upon the release of the operating handle 10.1, the weights l8 serve toreturn the carriage to its normal position, permitting the platen frame to return to normal position under the action of its spring 7 i and also through the belt connections with the operating handle, restoring it to it's normal position. As the pin 75 on lever 10 passes the arm 76 on the shaft 71, the latter is rocked rearwardly, causing the shaft 71 to rock the required distance to engage the rod 69 with all of the detents, restoring them to normal position and permitting the release of depressed keys.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim l. A machine of the class described, comprising a plurality of banks of keys, the keys of each bank being arranged for differential adjustment, a type carrier for each of said banks, and means for differentially adjusting said type carriers according to the keys depressed and also according to the differential adjustment of said keys.

2. In a machine of the class described, a keyboard comprising a plurality of banks of depressible keys, type carriers under the control of said keys, and adjustable means for retaining keys in depressed position at different points along their stroke.

3. In a typewriting machine, the combination of a frame, a type-carriage mounted for reciprocation in said frame, type bars slidably mounted in said carriage, and a keyboard comprising a bank of keys for each type bar, each of said keys being differentially adjustable for the purpose of differentially controlling its respective type bar.

4. In a typewriting machine, the combi nation of a frame, a type-carriage mounted for reciprocation in said frame, type bars slidably mounted in said carriage, a keyboard comprising a bank of keys for each type bar, each of said keys being differentially adjustable for the purpose of differentially controlling its respective type bar, a platen, a pivoted support for said platen, means for reciprocating said type-carriage, and connections for rocking said platen support for the purpose of engaging the platen with adjusted type bars.

5. In a typewriting machine, the combi nation of a frame, a type-carriage mounted for reciprocation in said frame, type bars slidably mounted in said carriage, a keyboard comprising a bank of keys for each type bar, each of said keys being differentially adjustable for the purpose of difierentially controlling its respective type bar, a platen, a pivoted support for said platen, and means for reciprocating said type-carriage, saidcarriage being provided with a member for engaging and rocking said platen support for the purpose of engaging the platen with adjusted type bars.

6. In a typewriting machine, the combination of a frame, type bars mounted for reciprocation in said frame, means for reciprocating said type bars, and a keyboard for controlling the extent of movement of said type bars, said keyboard comprising a bank of keys for each type bar, and each of said keys being differentially adjustable for the purpose of differentially controlling its respective type bar.

7 In a typewriting machine, the combination of a frame, type carriers mounted for differential adjustment in said frame, means for driving said type carriers, and a keyboard for controlling the extent of Signed at Baltimore this 21st day of Lnovefiment ofi said Qgpe keariirs, 2M key}; Sept., 1916.

oar compnsm a, an o e s or eac type bar and each ofi said keys h8 1 (iifi'eren- FRED DOLPH' 5 tially adjustable for the purpose 0 difieren- Witnesses:

tially controlling its respective type car- CHARLES E. WYATT, rier SMITH H. Bmcmr. 

